I have a bunch of 8-week-old mixed chicks. In the earlier weeks I started guessing their sexes by feather growth, then the appearance of wattles etc. and figured I had 9 girls, 4 boys. As they got older, I only ever noticed two do the "practice roo-fighting"; one of which vanished a while ago Anyway, all have been fully feathered for a while now and all the ones I've been able to pick up and inspect have no signs of pointy rooster feathering yet. I can't remember how old my chicks from last year were when I could finally say for sure - anybody know?